Francis III, Duke of Brittany, Dauphin of France, Brother of Henry II (b. 1518)

Francis III (Breton: Frañsez; French: François; 28 February 1518 – 10 August 1536) was Duke of Brittany and Dauphin of Viennois. He was the first son of King Francis I of France and Duchess Claude of Brittany.